Checking The Connector

Fig 1: Engine Start Verification

Courtesy of VOLVO CARS CORPORATION

Ignition off
Check the heated oxygen sensor (HO2S) connector. Check for contact resistance and oxidation
Reinstall the components, reconnect the connectors etc.
Start the engine. Allow the engine to idle.
Read off the diagnostic trouble code (DTC) status for the front heated oxygen sensor (HO2S).

The text "NOT READY" is displayed if the diagnosis is running.

Other information
- For 6 cylinder engines -2004, see SIGNAL SPECIFICATION
- For 6 cylinder engines 2005-, see SIGNAL SPECIFICATION .
- To access or replace the heated oxygen sensor (HO2S), see HEATED OXYGEN SENSOR (HO2S), REPLACING
- see CHECKING WIRING AND TERMINALS
Fig 2: Identifying Front Heated Oxygen Sensor Connector Terminals
Courtesy of VOLVO CARS CORPORATION

Fig 3: Identifying VCT2000 Diagnostic Tool Symbol In VIDA
Courtesy of VOLVO CARS CORPORATION

Fig 4: Front Heated Oxygen Sensor
Courtesy of VOLVO CARS CORPORATION

Is "FAULT NOT DETECTED" displayed?